35 lines
997 B
Rust
35 lines
997 B
Rust
#![no_std]
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#![no_main]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::adc::{Adc, SampleTime};
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use embassy_time::Timer;
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_stm32::init(Default::default());
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info!("Hello World!");
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let mut adc = Adc::new(p.ADC1);
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adc.set_sample_time(SampleTime::CYCLES79_5);
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let mut pin = p.PA1;
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let mut vrefint = adc.enable_vrefint();
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let vrefint_sample = adc.blocking_read(&mut vrefint);
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let convert_to_millivolts = |sample| {
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// From https://www.st.com/resource/en/datasheet/stm32g031g8.pdf
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// 6.3.3 Embedded internal reference voltage
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const VREFINT_MV: u32 = 1212; // mV
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(u32::from(sample) * VREFINT_MV / u32::from(vrefint_sample)) as u16
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};
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loop {
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let v = adc.blocking_read(&mut pin);
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info!("--> {} - {} mV", v, convert_to_millivolts(v));
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Timer::after_millis(100).await;
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}
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}
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